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Quantitative Aptitude

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Percentage & Averages

Question
28 out of 30
 

The average age of 30 students is 9 years. If the age of their teacher is included, it becomes 10 years. The age of the teacher is



A 27 years
B 31 years
C 35 years
D 40 years
E None of these

Ans. D Age of teacher = 10 + 30 = 40

Percentage & Averages Flashcard List

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